2.1 Demolition/Removal Disconnect, remove, and legally dispose of existing RTUs/split components, associated curb covers, abandoned controls, and related appurtenances. Protect roof, flashing, and penetrations; provide temporary weather protection as needed; promptly repair any damage. 2.2 New Work – Equipment & Accessories Furnish and install new RTUs and split system equipment per basis‑of‑design. Include: factory economizers (where applicable), outdoor air dampers, freezestats, condensate management, service disconnects, vibration isolation, and MERV‑rated filters (minimum MERV‑8, or MERV‑13 if required by code or as existing). Provide UL‑listed curb adapters sized to existing curbs; include new gasketing, hardware, and weatherproofing. Reconnect to existing supply/return ducts; modify as required to ensure airtight transitions and maintain clearances for service. Provide new smoke detectors in return air per code, interlocked with equipment. 2.3 Electrical Provide new non‑fused or fused disconnects as required; reconnect branch circuits; provide control power; coordinate all electrical work with the Authority Having Jurisdiction (AHJ)
